Pergunta de entrevista da empresa Fiserv
All were simple SQL based questions. The only thing is to focus more on your SQL joins during the workshop. They will give you many to many relationship tables so you can end up creating duplicates.
Resposta da entrevista
Sigiloso
23 de jan. de 2020
Whenever you pick a table to join make sure that the ID you are using to join does not have duplicates. To be double sure always check the number of rows after each join. :)